Bruce Walter Timm (born February 8, 1961) is an American character designer, animator and producer. He is also a writer and artist working in comics, and is known for his contributions building the modern DC Comics animated franchise, the DC animated universe.

DC universe animated series, including Justice League, Justice League Unlimited, Batman Beyond, and other DC-set works associated with Timm (and his collaborators') art styles are often referred to by fans as "The Timmverse" of DC comics, relating to those series' distillation of popular storylines from the comic book versions or the outright introduction of new characters or relationships (such as Harley Quinn, alterations to The Question's personality and background, or Batman and Wonder Woman's romantic fling).

Though Timm does not usually work as an actor, he has played several characters in the animated series he has been involved in. His cameos include the episode of Batman: The Animated Series "Beware the Gray Ghost", playing the toy shop owner, as himself in the episode of The New Batman Adventures, "Holiday Knights", and also as the leader of the Jokerz gang in Batman Beyond, which he joked he did under duress and also joked was "Emmy Award-winning material". More recently, he appeared in an animated form in Batman: The Brave and the Bold episode "Legends of the Dark Mite" in a comic book convention parody scene, where he was wearing Joker's costume, along with Paul Dini wearing Harley Quinn's costume. Prior to that he was animated in The Batman, appearing as a mental patient in Arkham. He has also played a guard in the direct-to-videoanimated filmBatman Beyond: Return of the Joker.

While Timm is known primarily for his work in animation, his first ambition was to become a comic-book artist and has thus produced several one-shots and miniseries, mostly for DC Comics. In the 1980s, he made some mini-comics for Masters of the Universe.

In 1994, Timm and writer Paul Dini won the Eisner Award for Best Single Story for Batman Adventures: Mad Love. Timm won the same prize the next year as well, for Batman Adventures Holiday Special, (a one-shot with several Christmas-themed stories) with Dini, Ronnie del Carmen and others. Later, Timm was involved with Batman Adventures and has also worked on Avengers and Vampirella. He is also a popular cover and pin-up artist.

In 2000, he did the art for an issue of DC's Vertigo imprint horror title, Flinch.

Bruce Timm co-created Harley Quinn (with Paul Dini), working from Dini's original design. Harley's popularity on television led to her inclusion in the mainstream DC Universe. In 2004, Timm and Dini (assisted by Shane Glines as inker) released a three-issue Harley and Ivy miniseries, which was in the works for years.

Timm also drew the 1999 Avengers 1½ special for Marvel Comics, written by Roger Stern.

In 2005, Timm contributed artwork for two comics. One was a short story in Conan #18, titled "Conan's Favorite Joke". The other was a Black Canary short story in Birds of Prey #86.

In 2008, he provided the art work for a short two-page Harley Quinn origin story for Paul Dini's countdown.

Timm was featured in "Conan Gets Animated", a skit in the December 9, 2010 episode of the TBS late night talk show Conan, in which host Conan O'Brien enlisted his help in designing a new superhero, based on O'Brien's specifications. The superhero, who was designed to resemble O'Brien, included a typically muscular superhero body and costume with chest insignia, as well as idiosyncrasies such as an oven mitt, a jai alai glove, golf shoes, sock garters and fishnet stockings.[2] One month later, O'Brien aired a clip on his show in which the character, named "The Flaming C", appears in Young Justice.[3]

In the summer of 2013, Timm provided the cover artwork for Adventures of Superman #4.[4]